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Math examples in the second volume of the second day of junior high school
I found 50 math problems in Grade Two. It feels good. I'll give it to you if it suits you! ~ Hehe, come on, be sure to work hard! ~———————————————————— (1) The p term is a point above the bisector AD of ∠BAC, and 3) The coordinates of the point about the axis symmetry of X are (A) (2,-3) (b) (-) (4) There are 4 people in one class, with a score of 100 and a score of 90 168. The remaining 8 people scored 300 points, with the median of _ _ _ _ _ _ _ _ (a) 70 points (B) 80 points (C) 90 points (D) 100 points (5) If the linear function y = KX+(k- 1), then k is taken. It is known that the circumference of △ABC is 24, AB=AC, AD⊥BC and D are vertical feet. Then the length of AD is (a) 6 (b) 8 (c)10 (d)12. The coordinate of the symmetrical point A' of the secondary point A(2,-1) with respect to the X axis is (a) (- 1, 2. 1) Item (8) It is known that in a sample, 50 data are classified into five groups, and the first, second, third and fifth groups of data are 2,8,15,5 respectively, so the frequency and frequency of the fourth group are (A) 25 and 50% (B) 20 respectively. 40% Item (9) Calculation: the square root of 25 is _ _ _ _ _ _ _ (a) 6 (b) 5 (c) 7 (d) 8 (10) Select the correct option. A vertex of a known rectangle draws a vertical line to its diagonal, and the vertical line is divided into right angles. Then the angle between the vertical line and the other diagonal line is (a a) 60 (b) 45 (c) 30 (d) 25d) 25 (11). In parallelogram ABCD, AE⊥BC is in E, AF⊥CD is in F, ∞. 0? 2, then ∠ EAF = _ _ _ _ _ (a) 60 (b) 90 (c)1800 (d) 270 (12) is in the plane rectangular coordinate system. Point p (-2,3). 3) Question (13) If both sides of a triangle are 4 and 5, then the length of the third side is _ _ _ _ _ _ _ (a) 4 (b) 5 (c) 3 (d) 6 (14). Then the coordinates of point A are (a) (0,2 2) (B) (0 0,3 3) (C) (0 0,4 4) (D) (0 0,5) (-3,2) and point Q are symmetrical about the origin, so point Q is in _ _ _ _. -2 (c)-2,2 (d) 2,65438+Then its vertex angle is (a) 70 (b) 55 (c) 40 (d) 40 or 70 (18). The maximum value of 80 samples is 14 1, the minimum value is 50, and the grouping distance is 65438+. It can be divided into (A) 10 group (B) 9 groups (c), 8 groups (d) and 7 groups (19). Given that point A is in the fourth quadrant, and the distances to the X axis and Y axis are 3 and 5 respectively, the coordinate of point A is _ _ _ _ _ _ _ _ _ _ _(A). 3) Question (20) The following statements are correct: (a) Translation and rotation both represent the motion process of an object (figure), so translation is rotation; (b) Because the centrally symmetric figure is a rotationally symmetric figure, the rotationally symmetric figure is also a centrally symmetric figure; (c) Rectangular rhombic square is both a central symmetrical figure and an axisymmetric figure. The isosceles trapezoid is both an axisymmetric figure and a central symmetry (D). Because a and a' are symmetrical points about O, in the (2 1) th statistical diagram, ao = A' O, and the sum of percentages represented by all sectors () (a) is greater than 1 (B) is equal to 1 (C) is less than 1 (D Sub-item (22) does not necessarily clearly show the temperature change of the patient. The statistical chart to be selected is (a) fan-shaped statistical chart (b) bar-shaped statistical chart (c) broken-line statistical chart (d), and none of the above is the third item (23). Of the domestic garbage, 23% is directly landfilled, 73% is burned and 40% is recycled. This item should be selected as _ _ _ _ _ _ _ _ _ _. (A) Fan (B) Diamond (C) Rectangle (D) Circle (Question 24) If there are 200 lottery tickets in 1000, then the probability of winning by drawing 1 lottery ticket is _ _ _ _ _. (a) 2/5 (b)1/6 (c)1/5 (d)1/3 If the image passing point of the function y =–k/x is known, then the following points are in the function y =-k/x. -1) (c) (-3/2,-1) (d) (-3, -2 1) Item (26) in parallelogram ABCD, ∠A ratio ∠. It is best to choose (a) bar chart (b) line chart (c) fan chart (d) histogram (29). The following question is about the understanding of frequency distribution table and frequency distribution histogram. It is correct that (a) the frequency distribution table can clearly reflect the change of things, (b) the frequency distribution histogram can clearly reflect the change of things, (c) the frequency distribution histogram can clearly show the percentage of each part in the whole, and (d) none of them can clearly reflect the change and the percentage in the whole. But it can reflect item (30) of each item. If the angle between one diagonal and one side of a rectangle is 40, then the degree of the acute angle formed by the two diagonals is _ _ _ _ _ _ (a) 80 (b) 90 (c)100 (d)1kloc-0 (3/kloc-0). Then the side length of the diamond-shaped ABCD is AB = _ _ _ _ _ _ cm (a)10 (b)1(c)12 (d)13. Figure ① below is made up of two congruent right triangles. ② Rectangular; ③ diamond shape; 4 squares; ⑤ isosceles triangle; ⑥ equilateral triangle. The figure that can definitely be spliced is (a)14⑤ (b) 25⑤ (c)123⑤ (the 33rd). The symmetry axis of the minor symmetric figure is a _ _ _ _ _ _ _ _ _ _ _ _ _ (a) curve (b) line segment (c). The rotation of _ _ _ _ _ _ _ _ degrees can coincide with the original drawing. (a) 125 or 240 (b) 120 or 240 (c) 120 or 250 (d) 6540. The bisectors of the angles coincide with each other (b) Two isosceles triangles with equal vertex angles are congruent (c) One side of an isosceles triangle cannot be twice as large as the other side (d) The two bottom angles of an isosceles triangle are equal (36) The quadrilateral obtained by sequentially connecting the midpoints of four sides of a quadrilateral with the same diagonal line is (a) a trapezoid (b) a diamond (c) a rectangle (d) and four children below a square (37). ② A positive number must have two square roots; ③ The number whose square root equals itself is 0 and1; The cube root of a number is either positive or negative. (a) 0 (B) 1 (C) 2 (D) 3 (38) Among the following statements, it is correct that (a) the bisectors of congruent triangles are equal; (b) The median lines of congruent triangles are equal; (c) congruent triangles is of equal height; The circumference of congruent triangles is equal; (39) The following statement is correct: (a) Translation does not change the shape and size of the figure. Rotation changes the shape and size of the graph. (b) The similarity between translation and rotation changes the position of the graph. (c) Graphics can be translated or rotated in a certain direction. (d) In translation and rotation, the corresponding angles are equal, and the corresponding line segments are equal and parallel. (40th time) After school, Xiaohong and Xiaoying broke up after school and went home to the southeast and southwest respectively. If Xiaohong and Xiaoying both walk at a speed of 40m/min, it takes 15min for Xiaohong to get home, 20min for Xiaoying to get home, and the linear distance between Xiaohong and Xiaoying is (a) 600m (b) 800m (c) 1000m (d), then (4 1). (2) The corresponding line segments are equal; (3) The corresponding angles are equal; (4) The shape and size of the graphics have not changed. (A) (1), (2), (3) (B) (2), (3), (4) (C) (1), (2), (4) (D) (1), (. A quadrilateral with four equal sides is a rhombus (43). The following statement is incorrect: (a) The circumference of congruent triangles is equal; (b) The area of congruent triangles is equal; congruent triangles must be the 50th data in the item (44) of an equilateral triangle, which is divided into 6 groups. The frequencies of 1-4 groups are 5, 7, 8 and 10 respectively, and the frequency of 5 groups is 0.2. Then the frequency of the sixth group is (a)10 (b)11(c)12 (d)13. It is known that point A -4) (D) (4, -5) (C) (-5 is symmetrical about y, and the coordinate of point A is (. 5) Question (46) If AC is the height of the isosceles ABC, and the frequency of alternating current is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _, the score in 90~ 100 is 0. 1, then there are _ _ _ _ _ _ students in this score (A There are _ _ _ _ _ _ _ _ students (A) 36 degrees, 1080 students (B) 38 degrees, 1063 students (C) 33 degrees, 1 120 students (d 3) (B) (6, -3) (c) (-2, 3) (d) (-3, -3) The image of the 50th subfunction y =-x+2 does not pass through (a) the first quadrant (b) the second quadrant (c) the third quadrant (d) the fourth quadrant. 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8? 7? 8 The above is purely a continuation of the editing/originality of Smile (442802384).

I hope it will help you, thank you for your support! ~~~~